ORIGINAL: Antique
What's easier than putting bolt through a prop and tightening it until it doesn't sip ?
Why have to drill 4 new holes in a new prop that already has a single hole in the center ?
To each his own

FWIW, you can believe it or not, some of us DO know more than the Chinese manufacturers and have been doing it longer...
You missed my point, but that's OK, not worth going over